com.bumptech.glide.load.resource.bitmap.Downsampler Java Examples

@Override
public void registerComponents(@NonNull Context context, @NonNull Glide glide, @NonNull Registry registry) {
  AttachmentSecret attachmentSecret = AttachmentSecretProvider.getInstance(context).getOrCreateAttachmentSecret();
  byte[]           secret           = attachmentSecret.getModernKey();

  registry.prepend(File.class, File.class, UnitModelLoader.Factory.getInstance());
  registry.prepend(InputStream.class, new EncryptedCacheEncoder(secret, glide.getArrayPool()));
  registry.prepend(File.class, Bitmap.class, new EncryptedBitmapCacheDecoder(secret, new StreamBitmapDecoder(new Downsampler(registry.getImageHeaderParsers(), context.getResources().getDisplayMetrics(), glide.getBitmapPool(), glide.getArrayPool()), glide.getArrayPool())));
  registry.prepend(File.class, GifDrawable.class, new EncryptedGifCacheDecoder(secret, new StreamGifDecoder(registry.getImageHeaderParsers(), new ByteBufferGifDecoder(context, registry.getImageHeaderParsers(), glide.getBitmapPool(), glide.getArrayPool()), glide.getArrayPool())));

  registry.prepend(BlurHash.class, Bitmap.class, new BlurHashResourceDecoder());

  registry.prepend(Bitmap.class, new EncryptedBitmapResourceEncoder(secret));
  registry.prepend(GifDrawable.class, new EncryptedGifDrawableResourceEncoder(secret));

  registry.append(ContactPhoto.class, InputStream.class, new ContactPhotoLoader.Factory(context));
  registry.append(DecryptableUri.class, InputStream.class, new DecryptableStreamUriLoader.Factory(context));
  registry.append(AttachmentModel.class, InputStream.class, new AttachmentStreamUriLoader.Factory());
  registry.append(ChunkedImageUrl.class, InputStream.class, new ChunkedImageUrlLoader.Factory());
  registry.append(StickerRemoteUri.class, InputStream.class, new StickerRemoteUriLoader.Factory());
  registry.append(BlurHash.class, BlurHash.class, new BlurHashModelLoader.Factory());
  registry.replace(GlideUrl.class, InputStream.class, new OkHttpUrlLoader.Factory());
}
 

private static <T> Bitmap createScaledBitmapInto(Context context, T model, int width, int height)
    throws BitmapDecodingException
{
  final Bitmap rough = Downsampler.AT_LEAST.decode(getInputStreamForModel(context, model),
                                                   Glide.get(context).getBitmapPool(),
                                                   width, height,
                                                   DecodeFormat.PREFER_RGB_565);

  final Resource<Bitmap> resource = BitmapResource.obtain(rough, Glide.get(context).getBitmapPool());
  final Resource<Bitmap> result   = new FitCenter(context).transform(resource, width, height);

  if (result == null) {
    throw new BitmapDecodingException("unable to transform Bitmap");
  }
  return result.get();
}
 

public static <T> byte[] createScaledBytes(Context context, T model, MediaConstraints constraints)
    throws BitmapDecodingException
{
  CompressFormat compressFormat = CompressFormat.PNG;

  int    quality  = 100;
  int    attempts = 0;
  byte[] bytes;

  Bitmap scaledBitmap =  Downsampler.AT_MOST.decode(getInputStreamForModel(context, model),
                                                    Glide.get(context).getBitmapPool(),
                                                    constraints.getImageMaxWidth(context),
                                                    constraints.getImageMaxHeight(context),
                                                    DecodeFormat.PREFER_RGB_565);

  if (scaledBitmap == null) {
    throw new BitmapDecodingException("Unable to decode image");
  }
  
  try {
    do {
      attempts++;
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      scaledBitmap.compress(compressFormat, quality, baos);
      bytes = baos.toByteArray();

      Log.w(TAG, "iteration with quality " + quality + "; size " + (bytes.length / 1024) + "kb; attempts " + attempts);

      compressFormat = CompressFormat.JPEG;

      if (quality > MAX_COMPRESSION_QUALITY) {
        quality = MAX_COMPRESSION_QUALITY;
      } else {
        quality = quality - COMPRESSION_QUALITY_DECREASE;
      }
    }
    while (bytes.length > constraints.getImageMaxSize(context));
    return bytes;
  } finally {
    if (scaledBitmap != null) scaledBitmap.recycle();
  }
}
 

/**
 * Load images using the given {@link Downsampler}. Replaces any existing image decoder. Defaults to
 * {@link Downsampler#AT_LEAST}. Will be ignored if the data represented by the model is a video. This replaces any
 * previous calls to {@link #imageDecoder(ResourceDecoder)}  and {@link #decoder(ResourceDecoder)} with default
 * decoders with the appropriate options set.
 *
 * @see #imageDecoder
 *
 * @param downsampler The downsampler.
 * @return This request builder.
 */
private BitmapRequestBuilder<ModelType, TranscodeType> downsample(Downsampler downsampler) {
    this.downsampler = downsampler;
    imageDecoder = new StreamBitmapDecoder(downsampler, bitmapPool, decodeFormat);
    super.decoder(new ImageVideoBitmapDecoder(imageDecoder, videoDecoder));
    return this;
}
 

/**
 * Load images at a size near the size of the target using {@link Downsampler#AT_LEAST}.
 *
 * @see #downsample(Downsampler)
 *
 * @return This request builder.
 */
public BitmapRequestBuilder<ModelType, TranscodeType> approximate() {
    return downsample(Downsampler.AT_LEAST);
}
 

/**
 * Load images at their original size using {@link Downsampler#NONE}.
 *
 * @see #downsample(Downsampler)
 *
 * @return This request builder.
 */
public BitmapRequestBuilder<ModelType, TranscodeType> asIs() {
    return downsample(Downsampler.NONE);
}
 

/**
 * Load images at a size that is at most exactly as big as the target using
 * {@link Downsampler#AT_MOST}.
 *
 * @see #downsample(Downsampler)
 *
 * @return This request builder.
 */
public BitmapRequestBuilder<ModelType, TranscodeType> atMost() {
    return downsample(Downsampler.AT_MOST);
}